Barcelona faced record-breaking heat on June 28, 2025, with afternoon temperatures soaring past 35°C in the city’s historic quarter. For Montse Aguilar, a 51-year-old cleaning worker, the extreme weather proved fatal.

Montse began her shift at 2:30 p.m., working in the old town’s dense streets where heat and humidity were amplified by narrow alleys and heavy tourist traffic. She reportedly complained of chest tightness, muscle cramps, and back pain. Her supervisor advised her to rest and stay hydrated, but she chose to complete her shift.

That evening, Montse messaged a friend to say she had felt “like I was going to die” earlier that day. Minutes later, while having dinner with her elderly mother, she collapsed. Neighbors attempted resuscitation, but she could not be revived.

While the autopsy has yet to confirm the cause of death, her family believes she suffered heatstroke and is preparing to take legal action against both the private cleaning company and the city of Barcelona. The local government has denied wrongdoing but has opened an investigation into workplace conditions during the heatwave.

Medical experts emphasize that fatal heatstroke is a growing risk in urban centers, particularly for workers in outdoor or poorly ventilated environments. The body’s ability to regulate internal temperature can break down rapidly in such conditions, especially during physical exertion. Without timely intervention, hyperthermia can lead to multi-organ failure and death in a matter of hours.

“Heatstroke is not just discomfort — it’s a medical emergency,” warned a spokesperson from the Spanish Emergency Medical Association. Vulnerable groups include the elderly, children, and anyone working under the sun or in hot enclosed spaces.